oj.uz

Submission #136007

# Submission time Handle Problem Language Result Execution time Memory
136007 2019-07-24T15:19:23 Z JustasZ The Big Prize (IOI17_prize) C++14
20 / 100
 102 ms 504 KB 
#include "prize.h"
#include <bits/stdc++.h>
#define pb push_back
#define all(a) a.begin(), a.end()
#define sz(a) (int)a.size()
#define x first
#define y second
#define debug(...) cout << "[" << #__VA_ARGS__ << ": " << __VA_ARGS__ << "]\n"
#define rd() abs((int)rng())
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int>pii;
const int maxn = 2e5 + 100;
const int mod = 1e9 + 7;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
/*vector<int> ask(int i)
{
	cout << "? " << i << endl;
	vector<int>a(2);
	cin >> a[0] >> a[1];
	return a;
}*/
int find_best(int n)
{
	vector<int>a;
	if(n < 5000)
	{
		for(int i = 0; i < n; i++)
		{
			a = ask(i);
			if(a[0] == 0 && a[1] == 0)
				return i;
		}
	}
	int mx = 0;
	for(int it = 0; it < 5; it++)
	{
		int p = rd() % n;
		a = ask(p);
		mx = max(mx, a[0] + a[1]);
	}
	assert(mx < 500);
	int cnt = 5;
	int i = 0;
	while(i < n)
	{
		//assert(++cnt < 10000);
		a = ask(i);
		if(a[0] + a[1] == 0)
			return i;
		if(a[0] + a[1] == mx)
		{
			int fi = a[0], se = a[1];
			int l = i + 1, r = n - 1;
			while(l < r)
			{
				int mid = (l + r) / 2;
				//assert(++cnt < 10000);
				a = ask(mid);
				if(a[0] + a[1] != mx)
					r = mid;
				else
				{
					if(a[0] > fi)
						r = mid - 1;
					else
						l = mid + 1;
				}
			}
			//assert(++cnt < 10000);
			a = ask(l);
			//assert(a[0] + a[1] != mx);
			if(a[0] + a[1] == 0)
				return l;
			i = l + 1;
		}
		else 
			i++;
	}
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:54:19: warning: unused variable 'se' [-Wunused-variable]
    int fi = a[0], se = a[1];
                   ^~
prize.cpp:44:6: warning: unused variable 'cnt' [-Wunused-variable]
  int cnt = 5;
      ^~~
prize.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 248 KB Output is correct
10 Correct 2 ms 248 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 248 KB Output is correct
8 Correct 18 ms 252 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 392 KB Output is correct
11 Correct 3 ms 400 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 248 KB Output is correct
15 Correct 19 ms 396 KB Output is correct
16 Partially correct 74 ms 396 KB Partially correct - number of queries: 7101
17 Correct 2 ms 248 KB Output is correct
18 Partially correct 70 ms 396 KB Partially correct - number of queries: 8332
19 Correct 2 ms 248 KB Output is correct
20 Correct 28 ms 376 KB Output is correct
21 Correct 38 ms 376 KB Output is correct
22 Correct 10 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 316 KB Output is correct
25 Correct 42 ms 248 KB Output is correct
26 Correct 32 ms 248 KB Output is correct
27 Correct 3 ms 248 KB Output is correct
28 Partially correct 58 ms 376 KB Partially correct - number of queries: 7909
29 Partially correct 65 ms 376 KB Partially correct - number of queries: 5989
30 Partially correct 52 ms 396 KB Partially correct - number of queries: 8268
31 Correct 2 ms 248 KB Output is correct
32 Correct 4 ms 376 KB Output is correct
33 Correct 2 ms 248 KB Output is correct
34 Correct 29 ms 400 KB Output is correct
35 Correct 3 ms 400 KB Output is correct
36 Correct 21 ms 248 KB Output is correct
37 Correct 4 ms 376 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 30 ms 292 KB Output is correct
40 Partially correct 70 ms 248 KB Partially correct - number of queries: 7066
41 Correct 26 ms 396 KB Output is correct
42 Correct 33 ms 376 KB Output is correct
43 Correct 38 ms 376 KB Output is correct
44 Correct 45 ms 316 KB Output is correct
45 Correct 34 ms 312 KB Output is correct
46 Correct 2 ms 248 KB Output is correct
47 Correct 22 ms 396 KB Output is correct
48 Partially correct 61 ms 248 KB Partially correct - number of queries: 6160
49 Correct 9 ms 248 KB Output is correct
50 Partially correct 57 ms 376 KB Partially correct - number of queries: 8321
51 Correct 34 ms 248 KB Output is correct
52 Correct 3 ms 312 KB Output is correct
53 Correct 3 ms 308 KB Output is correct
54 Correct 39 ms 376 KB Output is correct
55 Correct 2 ms 504 KB Output is correct
56 Partially correct 102 ms 308 KB Partially correct - number of queries: 8321
57 Partially correct 35 ms 432 KB Partially correct - number of queries: 6084
58 Partially correct 50 ms 312 KB Partially correct - number of queries: 6187
59 Correct 44 ms 312 KB Output is correct
60 Correct 35 ms 400 KB Output is correct
61 Correct 3 ms 316 KB Output is correct
62 Correct 2 ms 248 KB Output is correct
63 Correct 4 ms 248 KB Output is correct
64 Correct 2 ms 312 KB Output is correct
65 Correct 3 ms 376 KB Output is correct
66 Correct 6 ms 376 KB Output is correct
67 Correct 2 ms 396 KB Output is correct
68 Correct 6 ms 248 KB Output is correct
69 Correct 4 ms 312 KB Output is correct
70 Correct 2 ms 312 KB Output is correct
71 Partially correct 51 ms 396 KB Partially correct - number of queries: 8295
72 Correct 7 ms 380 KB Output is correct
73 Partially correct 53 ms 376 KB Partially correct - number of queries: 8184
74 Partially correct 76 ms 248 KB Partially correct - number of queries: 8287
75 Correct 4 ms 248 KB Output is correct
76 Partially correct 57 ms 248 KB Partially correct - number of queries: 7071
77 Partially correct 75 ms 248 KB Partially correct - number of queries: 8364
78 Correct 9 ms 392 KB Output is correct
79 Correct 42 ms 248 KB Output is correct
80 Partially correct 46 ms 312 KB Partially correct - number of queries: 8396
81 Partially correct 75 ms 252 KB Partially correct - number of queries: 8370
82 Partially correct 86 ms 308 KB Partially correct - number of queries: 8318
83 Correct 3 ms 376 KB Output is correct
84 Partially correct 38 ms 248 KB Partially correct - number of queries: 6817
85 Partially correct 65 ms 504 KB Partially correct - number of queries: 8372
86 Incorrect 62 ms 316 KB Incorrect
87 Halted 0 ms 0 KB -